early pregnancy - Nuchal Translucency
12 weeks (11 to 13 weeks and 6 days)
Nuchal Scan is now part of the National Screening Program for Down's syndrome called the Combined Test which also incorporates a blood test. It involves measuring the small fluid space at the back of your baby's neck. This measurement, together with the mother's age, foetal length (CRL) and the blood tests are combined to give a risk factor by using computerised software.
The definite diagnosis of Down's syndrome is by performing CVS (Chorion Villus Sampling) at around 13 to 14 weeks or amniocentesis, performed at or after 16 weeks. Our foetal medicine consultant will offer further counselling if desired.
The scan will take half an hour and will
- Confirm the heartbeat and observe foetal movements
- Check for a multiple pregnancy
- Measure the foetus and confirm the due date
- Examine the anatomy of the foetus to exclude major structural defects
- Give you a scan image of your baby